Sonoma traffic alerts

Commuters should be aware of the following road conditions as they navigate the byways the week of Oct. 11, 2009:

In Sonoma Valley

• On Highway 12 between Trinity Road and Arnold Drive expect one-way traffic control from 9 p.m. to 7 a.m., Monday night/Tuesday morning through Thursday night/Friday morning.

In Sonoma County:

• On Highway 101 from the Rohnert Park Expressway to Santa Rosa Avenue the northbound and southbound #1 or #2 lanes will be closed on Sunday, Oct. 11 from 10 p.m. to 5 a.m. the following morning.

• On the same stretch of highway, from Monday night through Friday morning, the northbound and southbound #1 or #2 lanes will be closed from 11 p.m. to 5 a.m.

• The northbound Rohnert Park Expressway will be closed from 10 p.m. to 7 a.m.

• The northbound off-ramp from Wilfred Avenue will be closed from 8 p.m. to 7 a.m.

• The northbound on-ramp from Wilfred Avenue closed from 10 p.m. to 7 a.m.

• The northbound off-ramp to Santa Rosa Avenue will be closed from 8 p.m. to 8 a.m.

• Also on northbound 101 from the Marin County Line to Santa Rosa various lanes at various locations will be closed from 10 p.m. to 6 a.m.

In Marin County:

• Highway 101, between Central San Rafael and North San Pedro Road, various lanes in both directions will be closed between the hours of 8 p.m. and 5 a.m., and various ramps from 8 p.m. to 6 a.m.

• On Oct. 14 on Highway 101 near Marin City, just south of the Highway 1 Junction, the #3, 4, and 5 southbound lanes will be closed from 10 p.m. to 5 a.m., and the southbound Marin City off-ramp will be closed from 10 p.m. to 5 a.m.

• Oct. 15 also near Marin City, just south of Highway 1 Junction the #1 and lanes will be closed from 10 p.m. to 5 a.m.